pdf Search Engine is a one-trick pony with a trick that internet marketers developing an information product will love. When you search for a topic you’ll get a stripped-down, all-business result set with nothing but PDF files. I have been amazed at the quality of files it provides. pdf Search Engine is like a research shortcut; for reasons I haven’t quite figured out PDF files just appear to have higher quality information locked inside them. Within 5 minutes of discovering it I found some can’t miss information for my newest product.